.eslintrc.js

module.exports = {
  root: true,

  env: {
    browser: true,
    node:    true,
    es6:     true,
  },

  extends: [
    "eslint:recommended",
  ],

  rules: {
    "quotes":                ["error", "double", { "avoidEscape": true }],
    "semi":                  "off",
    "indent":                ["error", 2],
    "brace-style":           "error",
    "key-spacing":           ["error", { "align": "value" }],
    "object-curly-spacing":  ["error", "always"],
    "array-bracket-spacing": "error",
    "sort-imports":          ["error", { allowSeparatedGroups: true }],

    "comma-dangle": ["error", {
      "arrays":  "always-multiline",
      "objects": "always-multiline",
      "imports": "always-multiline",
      "exports": "always-multiline",
    }],
  },

  parserOptions: {
    sourceType:  "module",
    ecmaVersion: 2018,
  },
};